* {
	padding: 0;
	margin: 0;
}

.clear {
	clear: both;
}

/* ------------------导航栏部分------------------ */
.nav {
	background: #232a34;
	width: 100%;
	height: 70px;
}

.left_nav .logo {
	position: absolute;
	z-index: 3;
	top: 2%;
	left: 1%;
	color: white;
	font-family: 微软雅黑;
	font-size: 28px;
	text-align: center;
	width: 40px;
	height: 40px;
	border-radius: 5px;
	background: rgb(5, 160, 129);
}

.left_nav span {
	position: absolute;
	z-index: 3;
	top: 3%;
	left: 4%;
	color: white;
	font-family: 微软雅黑;
	font-size: 23px;
}

/* ---------------------------------搜索导航栏---------------------- */
.search_nav {
	position: absolute;
	top: 3%;
	left: 18%;
}

#search {
	width: 440px;
	height: 40px;
	border: none; /*取消默认的边框以设置自定义边框*/
	outline: none; /*取消浏览器默认的蓝光边框以设置自定义的输入框*/
	font-size: 16px;
	color: rgb(112, 112, 112);
	margin-left: 10px;
}
.searchBar {
	/*目的是设置自定义边框，比如圆角与阴影*/
	border: rgb(218, 218, 218) solid 1px;
	border-radius: 2em;
	width: 552px;
	height: 42px;
	box-shadow: 0px 0px 5px rgb(212, 212, 212);
	background: white;
}

.mcp {
	height: 35px;
}

.mg {
	height: 25px;
	margin-left: 15px;
}
#search,
.mcp,
.mg {
	vertical-align: middle;
}

/* ---------------右侧导航栏---------------- */

.right_nav {
	position: absolute;
	top: 3%;
	right: 5%;
}

.right_nav ul li {
	width: 115px;
	height: 30px;
	list-style-type: none;
	float: left;
	display: inline;
	text-align: center;
	padding: 5px 5px;
}

.right_nav a {
	display: block;
	width: 114px;
	margin: 0px;
	padding: 0px 0px 8px 8px;
	font-family: Microsoft YaHei;
	text-decoration: none;
	color: white;
	font-size: 17px;
	line-height: 1;
	font-weight: 400;
}

.submenu ul li a {
	color: black;
	background: white;
}

.right_nav ul li ul li {
	height: 45px;
	width: 113px;
	list-style: none;
	float: left;
	display: inline;
	text-align: center;
}
.right_nav ul li a:hover {
	color: gainsboro;
}

ul li .submenu {
	display: none;
}

ul li:hover .submenu {
	display: block;
}

.right_nav ul li ul li a:hover {
	color: gainsboro;
}

.myself a img {
	display: inline-block;
	width: 30px;
	height: 30px;
	border-radius: 15px;
	margin-right: 5px;
}

.myself dl {
	display: none;
}

.btn_upload {
	width: 110px;
	height: 32px;
	background-color: #05a081;
	border-radius: 30px;
	border: none;
	margin-left: 10px;
	margin-top: -5px;
	color: white;
}

.myself{
	margin-top: -3px;
}

/* --------------------中间导航栏部分-------------------- */
.main_content .main_nav ul {
	font-family: -apple-system, BlinkMacSystemFont, segoe ui, roboto, oxygen, cantarell, helvetica neue,
		ubuntu, sans-serif;
	font-size: 17px;
	font-weight: bold;
	text-align: center;
	list-style-type: none;
	border-bottom: 3px solid rgb(0 0 0 / 8%);
}

.main_content .main_nav ul li {
	display: inline;
	text-align: center;
	line-height: 60.6px;
	padding: 17.5px;
}

.main_nav a {
	display: inline-block;
	height: 60.6px;
	color: #5e5e5e;
	text-decoration: none;
}

#challenge {
	/* width: 30px; */
	/* padding-bottom: 14px; */
	border-bottom: 3.5px solid #0064f9;
	color: #0064f9;
}

.main_content .main_nav ul li:hover a {
	color: #0064f9;
}

/* ------------------主体内容部分 */
.lable {
	text-align: center;
	margin-top: 5%;
}

.lable h1 {
	display: block;
	font-size: 54px;
	line-height: 59px;
	font-weight: 700;
	letter-spacing: -0.7px;
}

.lable h2 {
	display: block;
	font-size: 29px;
	line-height: 25px;
	font-weight: 350;
}

/* --------------top1的位置定位--------- */
.top1 {
	position: absolute;
	z-index: 2;
	left: 50%; 
    top: 95%;
    transform: translate(-50%, -50%); /* 50%为自身尺寸的一半 */
	/* top: 50%;
	left: 30%; */
}

.top1 h2 {
	display: block;
	font-size: 28px;
	line-height: 28px;
	font-weight: 600;
	margin-top: 0;
	margin-bottom: 16px;
	margin-bottom: 1.7rem;
	text-align: center;
}

.top1 img {
	width: 900px;
	height: 500px;
	border-radius: 6px;
}

.img_content {
	width: 400px;
	height: 500px;
	display: inline-block;
	/* margin-left: 5%; */
}

.img_content img {
	border-radius: 6px;
	width: 400px;
	height: 350px;
}

.img_content .title_p , .top1 .title_p{
	display: block;
	font-size: 12px;
	line-height: 19px;
	font-weight: 600;
	margin-top: 0;
	margin-bottom: 7px;
	text-transform: uppercase;
	color: #5e5e5e;
	white-space: nowrap;
	text-overflow: ellipsis;
	overflow: hidden;
	margin-bottom: 0.4rem;
}

.img_content .content_p , .top1 .content_p{
	display: block;
	font-size: 18px;
	line-height: 26px;
	font-weight: 300;
	margin-top: 0;
	margin-bottom: 0;
}

.content_last {
	width: 100%;
	height: auto;
	background: #f9f9f9;
	position: absolute;
	/* border-bottom: 2px solid gray; */
	top: 140%;
}

.content_last h2 {
	display: block;
	font-size: 24px;
	line-height: 28px;
	font-weight: 600;
	margin-top: 4%;
	margin-bottom: 2%;
	margin-left: 13%;
}

.content {
	margin-left: 13%;
}

.content .img_content {
	margin-right: 1%;
}

.footer{
	margin-top: 190%;
	font-size: 25px;
	text-align: center;
}

